using ContosoUniversity.Data;
using Microsoft.EntityFrameworkCore;

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<SchoolContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

    services.AddMvc();
}

{
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=ContosoUniversity1;Trusted_Connection=True;MultipleActiveResultSets=true"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  }
}

public void ConfigureServices（IServiceCollection services）
{ 
 services 
  .AddMvc（）. 
  AddRazorPagesOptions（options => { 
   options.RootDirectory = "/Content";
  }）; 
}

using Microsoft.AspNetCore.Mvc; using Microsoft.AspNetCore.Mvc.RazorPages; using Microsoft.AspNetCore.Mvc.Rendering;
 
namespace RazorPages.Pages
{
 public class ProductModel : PageModel
 {
  public int Id { get; set; }
  public void OnGet(int id)
  {
   Id = id;
  }
 }
}

@page "{id}"
@model ProductModel
<p>The Id is @Model.Id</p>

public void ConfigureServices(IServiceCollection services)
{
 services
  .AddMvc()
  .AddRazorPagesOptions(options =>
  {
   options.Conventions.AddPageRoute("/extras/products", "product");
  });
}

context.Response.ContentType = "text/html";
await context.Response.SendFileAsync($@"{env.WebRootPath}/errors/500.html");